WO2016076616A1 - 디스플레이용 윈도우 필름 및 이를 포함하는 디스플레이 장치 - Google Patents
디스플레이용 윈도우 필름 및 이를 포함하는 디스플레이 장치 Download PDFInfo
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- WO2016076616A1 WO2016076616A1 PCT/KR2015/012085 KR2015012085W WO2016076616A1 WO 2016076616 A1 WO2016076616 A1 WO 2016076616A1 KR 2015012085 W KR2015012085 W KR 2015012085W WO 2016076616 A1 WO2016076616 A1 WO 2016076616A1
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- 229910052710 silicon Inorganic materials 0.000 description 1
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- 125000005409 triarylsulfonium group Chemical group 0.000 description 1
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- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- C08K5/3492—Triazines
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/066—Copolymers with monomers not covered by C09J133/06 containing -OH groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
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-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
- C09J2483/001—Presence of polysiloxane in the barrier layer
Definitions
- the present invention relates to a window film for display and a display device including the same.
- the transparent display refers to a display that has a high transmittance of the display and makes the back of the screen visible. Recently, transparent displays have been applied to not only flat panel displays but also flexible displays that can be folded and unfolded.
- the transparent display may adopt OLED, LCD, thin film electroluminescent (TFEL), or the like.
- Transparent displays are used in fields such as advertisements that are exposed to the outside due to their properties, and light emitting devices such as OLEDs may be damaged due to long-term UV exposure, thereby causing discoloration and shortening their lifespan.
- the UV absorber is imparted to the polarizer by including a UV absorber.
- the polarizer cannot be used in the transparent display, ultraviolet rays having short wavelengths, which have been absorbed by the polarizer, may reach the light emitting device. .
- the problem to be solved by the present invention is to provide a window film for a display that can minimize the damage, discoloration or shortening the life of the display device due to the low transmittance of light having a wavelength of 390nm or less.
- Another problem to be solved by the present invention is to provide a window film for display that can block the light having a wavelength of 390nm or less when the UV absorber is included and does not precipitate the UV absorber.
- Another problem to be solved by the present invention is to provide a window film for a display that can be applied to a transparent display, in particular a transparent OLED display.
- the window film for display of the present invention comprises a base layer, a coating layer formed on one side of the base layer, and an adhesive layer formed on the other side of the base layer, wherein at least one of the coating layer and the pressure-sensitive adhesive layer is a UV absorber About 3% by weight to about 20% by weight of the layer, the window film for display may have a transmittance of about 1% or less at a wavelength of 390nm or less.
- the display device of the present invention may include the window film for display.
- the present invention provides a window film for display that can minimize damage, discoloration, or shortening of lifespan of a display device due to low transmittance of light having a wavelength of 390 nm or less.
- the present invention provides a window film for display that can block light having a wavelength of 390 nm or less when the UV absorber is included and does not have precipitation of the UV absorber.
- the present invention provides a window film for display that can be applied to a transparent display, in particular a transparent OLED display.
- FIG. 1 is a cross-sectional view of a window film for a display according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of a window film for a display according to another embodiment of the present invention.
- FIG 3 is a cross-sectional view of a window film for a display according to another embodiment of the present invention.
- FIG. 4 is a cross-sectional view of a window film for a display according to another embodiment of the present invention.
- FIG. 5 is a cross-sectional view of a display device according to an embodiment of the present invention.
- (meth) acryl refers to acrylic and / or methacryl.
- solid content means the entirety of the composition except for the solvent.
- FIG. 1 is a cross-sectional view of a window film for a display of one embodiment of the present invention.
- the window film 100 for a display may include a base layer 110, a coating layer 120, and an adhesive layer 130.
- the base layer 110 supports the window film 100 for display and may be formed of an optically transparent material.
- the substrate layer may be formed of a glass substrate or an optically transparent flexible resin.
- the base layer is a polyester resin, polycarbonate (PC) resin, polyimide (PI) including polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate, polybutylene naphthalate, and the like. ), Polystyrene resin, polyether sulfone (PES) resin, poly (meth) acrylate resin, including polymethyl methacrylate, and the like.
- the base layer 110 may further include a reinforcing material such as glass fiber to increase the strength of the base layer.
- the base layer 110 may have a thickness of about 10 ⁇ m to about 200 ⁇ m. It can be used for the film for display in the above range. Specifically, the substrate layer may have a thickness of about 30 ⁇ m to about 100 ⁇ m.
- the coating layer 120 may be formed on one surface of the base layer 110 to protect the window film 100 for display from external impact.
- the coating layer 120 may be formed of a coating layer composition including a resin having one or more crosslinkable functional groups and an initiator.
- the resin having one or more crosslinkable functional groups may form a crosslinked structure to form a matrix of the coating layer 120 and increase the hardness of the coating layer 120.
- the "crosslinkable functional group” is cured by heat or light, and may include an epoxy group, a vinyl group, a (meth) acrylamide group or an allyl group including a (meth) acrylate group, an alicyclic epoxy group, a glycidyl group, or the like. Can be.
- the resin having a crosslinkable functional group may include a silicone resin having the crosslinkable functional group. These may be included alone or in combination of two or more.
- the silicone resin having a crosslinkable functional group may be a siloxane resin having a crosslinkable functional group.
- the siloxane resin having a crosslinkable functional group is subjected to hydrolysis and condensation reaction of an alkoxy silane having a crosslinkable functional group alone or a mixture of alkoxy silane having a crosslinkable functional group and a heterogeneous alkoxy silane having no crosslinkable functional group. It may be prepared, but is not limited thereto.
- alkoxy silane having the crosslinkable functional group may be represented by the following Chemical Formula 1.
- Heterogeneous alkoxy silanes having no crosslinkable functional group may be represented by the following formula (2). These may be included alone or in combination of two or more. However, it is not limited to these:
- R 1 is a linear or branched alkyl group having 1 to 6 carbon atoms containing a crosslinkable functional group or a crosslinkable functional group
- the crosslinkable functional group is a (meth) acrylate group, an alicyclic epoxy group, a glyce Diyl group, vinyl group, (meth) acrylamide group or allyl group
- R 2 is a linear or branched alkyl group having 1 to 7 carbon atoms
- n is an integer of 1 to 3).
- R 3 is an unsubstituted alkyl group having 1 to 20 carbon atoms, cycloalkyl group having 3 to 8 carbon atoms, alkenyl group having 2 to 20 carbon atoms, alkynyl group having 2 to 20 carbon atoms, aryl group having 6 to 20 carbon atoms.
- C1-C20 having a halogen, an amino group, a mercapto group, an ether group, an ester group, a carbonyl group, a carboxyl group, a nitro group, a sulfone group, an alkyd group, a carboxylic acid group, an alkyl group having 1 to 20 carbon atoms or an amino group
- An alkyl group, R 4 is an alkyl group having 1 to 7 carbon atoms, and m is an integer of 0 to 3).
- alkoxy silane represented by the formula (1) examples include 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltriethoxysilane and vinyltrimethoxy Silane, vinyltriethoxysilane, vinyltripropoxysilane, N- (3-acryloxy-2-hydroxypropyl) -3-aminopropyltrimethoxysilane, N- (3-acryloxy-2-hydroxy Propyl) -3-aminopropyltriethoxysilane, N- (3-acryloxy-2-hydroxypropyl) -3-aminopropyltripropoxysilane, 3-acryloxypropylmethylbis (trimethoxy) silane, 3-acryloxypropyltrimethoxysilane, 3-acryloxypropyltriethoxysilane, 3-acryloxypropyltripropoxysilane, 3- (meth) acryloxypropyltrime
- alkoxy silane represented by the formula (2) examples include tetramethoxysilane, tetraethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, dimethyldimethoxysilane and dimethyldi Ethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, triphenylmethoxysilane, triphenylethoxysilane, ethyltriethoxysilane, propylethyl Trimethoxysilane, N- (aminoethyl-3-aminopropyl) trimethoxysilane, N- (2-aminoethyl-3-aminopropyl) triethoxysilane, 3-aminopropyltrimethoxysilane, 3- Amino
- the siloxane resin having a crosslinkable functional group is a polysilsesquioxane having an alicyclic epoxy group or a siloxane resin having an alicyclic epoxy group or a cage-type polysilsesquioxane having a (meth) acrylate group. It may include one or more.
- hydrolysis and condensation reactions are commonly known to those skilled in the art. Specifically, the hydrolysis and condensation reaction may be performed by mixing a organosilane having a crosslinkable functional group and an alkoxysilane group with a predetermined solvent, and may further include a catalyst to control the reaction rate.
- the catalyst may be an acid catalyst such as hydrochloric acid, acetic acid, hydrogen fluoride, nitric acid, sulfuric acid, chlorosulfonic acid and iodic acid; Base catalysts such as ammonia, potassium hydroxide, sodium hydroxide, barium hydroxide and imidazole; Ion exchange resins such as Amberite IRA-400, IRA-67 and the like can be used.
- the hydrolysis and condensation reaction may be performed at room temperature for about 12 hours to about 7 days, and to promote the reaction, may be performed at about 60 ° C. to about 100 ° C. for about 2 hours to about 72 hours, but is not limited thereto. Do not.
- the solvent in the hydrolysis and condensation reaction is not particularly limited. For example, water, methanol, ethanol, propanol, isopropanol, n-butanol, tert-butanol, methoxypropanol may be used alone or in combination of two or more thereof.
- the initiator is used to cure the crosslinkable functional group of the silicone resin, and one or more of a photocationic initiator and an optical radical initiator may be used, and these may be used alone or in combination of two or more thereof.
- Photocationic initiators may be those known to those skilled in the art, specifically, it may be used an onium salt containing a cation and an anion.
- the cation include diphenyliodonium, 4-methoxydiphenyliodonium, bis (4-methylphenyl) iodonium and bis (4-tert-butyl Diaryl iodonium, triphenylsulfonium, diphenyl-4, such as phenyl) iodonium (bis (4-tert-butylphenyl) iodonium), bis (dodecylphenyl) iodonium, etc.
- Triarylsulfoniums such as -thiophenoxyphenylsulfonium (diphenyl-4-thiophenoxyphenylsulfonium), (4-tertbutylphenyl) diphenylsulfonium ((4-tert-butylphenyl) diphenylsulfonium), and bis [4- (di Phenyl sulfonio) phenyl] sulfide (bis [4- (diphenylsulfonio) phenyl] sulfide), etc. are mentioned.
- Hexafluoro Specific examples of the anionic phosphate (PF 6 -), tetrafluoroborate (BF 4 -), hexafluoroantimonate (SbF 6 -), hexafluoroantimonate are Senate (AsF 6 -), hexachloro Antimonate (SbCl 6 ⁇ ), triflate (CF 3 SO 3 ⁇ ), and the like.
- the radical photo initiator may be one known to those skilled in the art, and for example, one or more of thioxanthone, phosphorus, triazine, acetophenone, benzophenone, benzoin and oxime may be used.
- the initiator may be included in an amount of about 0.1 parts by weight to about 10 parts by weight, specifically about 0.5 parts by weight to about 5 parts by weight, and more specifically about 1 part by weight to about 3 parts by weight, based on 100 parts by weight of the silicone resin based on solids. Appropriate initiation, curing speed, curing rate in the above range may have a high hardness effect.
- the coating layer composition may further include a crosslinkable monomer.
- the crosslinkable monomer may be cured with the silicone resin to further increase the hardness of the coating layer.
- the crosslinkable monomer may include a monomer having at least one of an epoxy group such as a (meth) acrylate group, an alicyclic epoxy group, a glycidyl group, and an oxetane group.
- the crosslinkable monomer may be included in an amount of about 0.1 part by weight to about 40 parts by weight based on 100 parts by weight of the silicone resin based on solids. In the above range may be a high hardness of the coating layer and the effect of ensuring the flexibility of the coating layer.
- the coating layer 120 may have a thickness of about 1 ⁇ m to about 100 ⁇ m. It can be used for the film for display in the above range. In detail, the coating layer 120 may have a thickness of about 20 ⁇ m to about 60 ⁇ m. The coating layer 120 may have a pencil hardness of about 6H or more and more specifically about 7H to about 10H. It can be used as a window film for display in the above range to protect the device from the outside.
- the adhesive layer 130 is formed on the other surface of the base layer 110 to adhere the window film 100 for display to a display element (not shown in FIG. 1), and may include a UV absorber.
- a UV absorber By including a UV absorber, by absorbing and blocking light having a wavelength of about 390 nm or less, specifically about 380 nm or less, as well as about 380 nm to 390 nm, the external light stability of the display device to which the window film of the present embodiment is applied can be improved.
- the window film 100 for a display of the present embodiment may have a transmittance of about 1% or less at a wavelength of about 380 nm or less as well as about 390 nm or less. In the above range, it is possible to increase external light stability of various display devices, for example, organic light emitting devices, which are formed under the window film for display. In particular, when the display film is used in a transparent OLED display, it is possible to sufficiently prevent the damage of the blue light emitting material due to external light. Specifically, the window film for display may have a transmittance of about 0.001% to about 1%.
- the UV absorber may be included in about 3% to about 20% by weight of the adhesive layer 130, for example, about 3.5% to about 15% by weight, about 4% to about 15% by weight, about 5% by weight % To about 10% by weight. Within this range, it is possible to increase the external light stability of the display device to which the window film of the present embodiment is applied and to prevent precipitation of white spots by including an excessive amount of a UV absorber.
- the adhesive layer 130 may be formed of a pressure-sensitive adhesive (PSA) including a UV absorber, an adhesive layer composition such as an optical clear adhesive (OCA) including a UV absorber.
- PSA pressure-sensitive adhesive
- OCA optical clear adhesive
- the pressure-sensitive adhesive layer 130 may be formed of a pressure-sensitive adhesive layer composition containing a (meth) acrylic pressure-sensitive adhesive resin, a curing agent and a UV absorber.
- the (meth) acrylic adhesive resin has a (meth) acrylic monomer having an alkyl group, a (meth) acrylic monomer having a hydroxyl group, a (meth) acrylic monomer having an alicyclic group, a (meth) acrylic monomer having a heteroalicyclic group, and a carboxylic acid group ( It may be formed of a monomer mixture including one or more of the meth) acrylic monomers.
- the (meth) acrylic monomer having an alkyl group may include an (meth) acrylic acid ester having an unsubstituted alkyl group having 1 to 10 carbon atoms.
- the (meth) acrylic monomer having a hydroxyl group may include a (meth) acrylic acid ester having an alkyl group having 1 to 10 carbon atoms having at least one hydroxyl group.
- the (meth) acrylic monomer having an alicyclic group may include a (meth) acrylic acid ester having an alicyclic group having 3 to 10 carbon atoms.
- the (meth) acrylic monomer having a heteroalicyclic group may include a (meth) acrylic acid ester having a heterocycloaliphatic group having 3 to 10 carbon atoms having at least one of nitrogen, oxygen, or sulfur.
- the (meth) acrylic monomer having a carboxylic acid group may include (meth) acrylic acid and the like.
- the (meth) acrylic adhesive resin may be included in about 80% by weight or more, for example, about 90% by weight or more of the composition for a solid content adhesive layer. In the above range, there may be an effect of showing the optical properties such as the appropriate transmittance color and the appropriate adhesive force.
- the curing agent may include at least one of an isocyanate curing agent, an epoxy curing agent, an imide curing agent, and a metal chelate curing agent, and these may be used alone or in combination of two or more kinds.
- the curing agent may be included in about 0.1% by weight to about 1.5% by weight of the composition for the adhesive layer based on the solid content. It is possible to secure the adhesive strength and appropriate modulus of the pressure-sensitive adhesive in the above range.
- the UV absorber may use a UV absorber having an absorbance of at least about 0.25 AU and specifically about 0.30 AU to about 1.0 AU at a wavelength of 380 nm for a concentration of 20 mg / L in toluene (path 1 cm).
- the UV absorber may use a UV absorber having an absorbance of about 0.05 AU or more, specifically 0.1 AU or more at a wavelength of 390 nm for a concentration of 20 mg / L in toluene (path 1 cm).
- the UV absorber may use a UV absorber having a maximum absorption wavelength ( ⁇ max) greater than about 350 nm, specifically greater than about 350 nm and up to about 390 nm.
- the external light stability of the display device may be improved by sufficiently absorbing light at a wavelength of 390 nm or less and external wavelength of 380 nm to 390 nm to lower the transmittance.
- the UV absorber may be benzotriazole-based, triazine-based, and the like, more specifically may include one or more of the trade name Tinuvin 477, Tinuvin 326.
- the 'maximum absorption wavelength' refers to a wavelength representing the maximum absorption peak, that is, a wavelength that gives the maximum absorbance in an absorbance curve according to the wavelength.
- the 'absorbance' can be measured by conventional methods known to those skilled in the art.
- the UV absorber may be included in about 3% by weight to about 20% by weight of the solids of the composition for the adhesive layer. In the above range, it is possible to increase external light stability by securing transmittance of 1% or less at a wavelength of 390 nm or less and a wavelength of 380 nm to 390 nm, and prevents precipitation of white spots by including an excessive amount of a UV absorber.
- the adhesive layer composition may further include a silane coupling agent.
- the silane coupling agent may improve physical properties such as modulus by increasing the degree of crosslinking of the adhesive layer.
- the silane coupling agent may use a conventionally known silane coupling agent.
- the silane coupling agent is 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl Silicon compounds having an epoxy structure such as ethyltrimethoxysilane (2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane); Polymerizable unsaturated group-containing silicon compounds such as vinyltrimethoxysilane, vinyltriethoxysilane, and (meth) acryloxypropyltrimethoxysilane; 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane (N- (2 amino group-containing silicon compounds such as -aminoethyl
- the silane coupling agent may be included in about 0.1 wt% to about 5 wt%, specifically about 0.1 wt% to about 1 wt%, based on the solids in the composition for the adhesive layer. It is possible to secure an appropriate modulus of the pressure-sensitive adhesive in the above range.
- the adhesive layer 130 may have a thickness of about 1 ⁇ m to about 50 ⁇ m. It can be used for the film for display in the above range. Specifically, the adhesive layer 130 may have a thickness of about 10 ⁇ m to about 30 ⁇ m.
- the coating layer 120 may further include the above-described UV absorber.
- the UV absorber is about 3% to about 20% by weight in the coating layer 120, for example about 3.5% to about 15% by weight, about 4% to about 15% by weight, about 5% to about 10% by weight May be included as a%.
- FIG. 2 is a cross-sectional view of a window film for a display according to another embodiment of the present invention.
- the window film for display 200 may include a base layer 110, a coating layer 120 ′, and an adhesive layer 130 ′. Except that the UV absorber is not included in the adhesive layer but included in the coating layer is substantially the same as the display film according to an embodiment of the present invention.
- the coating layer 120 ′ may be formed of a coating layer composition including the above-mentioned resin for the coating layer and a UV absorber.
- UV absorbers are from about 3% to about 20% by weight, for example from about 3.5% to about 15%, from about 4% to about 15%, from about 5% to about 10% by weight of the solids of the composition for the coating layer. It may be included in weight percent. In the above range, transmittance of 1% or less may be ensured at a wavelength of 390 nm or less, specifically, at a wavelength of 380 nm to 390 nm.
- FIG. 3 is a cross-sectional view of a window film for a display according to another embodiment of the present invention.
- the display window film 300 may include a base layer 110, a coating layer 120 ′′, and an adhesive layer 130.
- the UV absorber is substantially the same as the display film according to the exemplary embodiment of the present invention except that the UV absorber is further included in the adhesive layer 130 and the coating layer 120 ′′, that is, the coating layer 120 ′′.
- the coating layer 120 ′′ may be formed of a coating layer composition including a resin having one or more crosslinkable functional groups, an initiator, and a UV absorber.
- the UV absorber in the solid content of the coating layer composition may be included in about 10% by weight or less, specifically about 5% by weight or less, for example, about 0.1% by weight to about 5% by weight.
- the UV absorber is included in the coating layer in the above range, it may be advantageous to secure the strength and optical properties of the coating layer.
- FIG. 4 is a cross-sectional view of a window film for a display according to another embodiment of the present invention.
- the display window film 100 ′ may include a base layer 110, a coating layer 120, and an adhesive layer 130.
- the display window film 100 ′ according to the present exemplary embodiment may have a structure in which the base layer 110, the adhesive layer 130, and the coating layer 120 are sequentially stacked in the above order. Except that the adhesive layer 130 is formed between the base layer 110 and the coating layer 120 is substantially the same as the window film for a display according to an embodiment of the present invention.
- the adhesive layer 130 or the coating layer 120 may include a UV absorber to sufficiently absorb long wavelength ultraviolet light, that is, about 390 nm or less and about 380 nm to 390 nm.
- the transparent display device of the embodiment of the present invention may include the film for display of the embodiments of the present invention.
- the transparent display device may include a transparent organic light emitting display device including a flexible transparent organic light emitting display device, but is not limited thereto.
- FIG. 5 is a cross-sectional view of the transparent display device of one embodiment of the present invention.
- the transparent display device 400 may include a substrate 10, an organic light emitting diode display 91 formed on the substrate 10, and including an organic light emitting layer 71.
- the window film 95 may be formed on the window film 95, and the window film 95 may include the window film for display of the embodiments of the present invention.
- the window film is formed on the organic light emitting display device, but the transparent display device is not limited to the organic light emitting display device, and may be a liquid crystal display (LCD), a light emitting display (LED), or the like.
- LCD liquid crystal display
- LED light emitting display
- the substrate 10 supports an organic light emitting display element included in the flexible display 300 and may include a substrate having flexibility.
- the substrate may be a silicon substrate, a polyimide substrate, a polycarbonate substrate, a polyacrylate substrate, or the like, but is not limited thereto.
- the organic light emitting diode display 91 includes an organic light emitting layer to emit light, and includes a buffer layer 25 formed on the substrate 10, a gate electrode 41 formed on the buffer layer 25, and a gate electrode 41. ) And the gate insulating layer 40 formed between the buffer layer 25.
- An active layer 35 including source and drain regions 31, 32, and 33 is formed in the gate insulating layer 40.
- the first electrode 70 and the pixel defining layer 180 are formed.
- the organic emission layer 71 and the second electrode 72 are formed on the pixel defining layer 180.
- the adhesive layer 92 adheres the touch screen panel 93 and the organic light emitting display device 91, and includes a (meth) acrylate resin, a crosslinking agent, an initiator, and a silane coupling agent. It can be formed as.
- the touch screen panel 93 detects an electrical signal by a touch of a finger or the like, and may be formed of a flexible material. Specifically, a conductor in which a metal nanowire, which is a flexible conductive material having flexibility, and a conductive film containing a conductive polymer are patterned can be used.
- the transparent display device may further include a polarizer on or below the touch screen panel 93 in the transparent display device according to an embodiment of the present invention, and the polarizer may be polarized, for example. It may be a film.
- the transparent display device may include a display unit, an adhesive layer formed on the display unit, and a window film formed on the adhesive layer, and the window film is a window film for display of embodiments of the present invention. It may include.
- the pressure-sensitive adhesive layer may be formed of a pressure sensitive adhesive including a (meth) acrylate-based resin, a crosslinking agent, an initiator, and a silane coupling agent.
- the display unit may be an organic light emitting display device, a liquid crystal display, a light emitting diode, or the like.
- a touch screen panel may be formed in the display unit.
- a polarizer or encapsulation may be formed on the top of the display unit, and the encapsulant may be glass or plastic film.
- PET polyethylene terephthalate
- KEL86W polyethylene terephthalate
- the PET film was laminated on the lower layer of Silplus M130, which is a film formed of a silicone resin having an acrylate group, as a coating layer, through the adhesive layer to prepare a display film.
- silsesquioxane resin having a cycloaliphatic epoxy functional group Solips, Epoxy Hybrimer, solid content of 90% by weight
- (4-tertbutylphenyl) diphenylsulfonium triflate Aldrich
- a photocationic polymerization initiator g 4.41 g of methyl ethyl ketone as diluents were mixed to prepare a composition for a coating layer.
- the substrate layer was coated with a composition for coating layer on one surface of a polyethylene terephthalate (PET) film (Teijin-Dupon, KEL86W), and dried at 80 ° C. for 3 minutes to prepare a 25 ⁇ m thick coating film, 30 ° C. and relative humidity 75 It was aged for 48 hours in a constant temperature / humidity oven of%.
- PET polyethylene terephthalate
- the prepared adhesive layer composition was applied to one surface of a release film PET film (Teijin-Dupon, KEL86W), and dried at 80 ° C. for 3 minutes to prepare a 25 ⁇ m thick coating film and a constant temperature of 30 ° C. and a relative humidity of 75%. Aged for 48 hours in a humidity cabinet. The aging adhesive layer was laminated on the other surface of the PET film having the coating layer to prepare a display film.
- a release film PET film Teijin-Dupon, KEL86W
- a coating layer composition was prepared by mixing 1.59 g, 6.15 g of methyl ethyl ketone as a diluent, and 4.10 g of Tinuvin 326 as a UV absorber.
- a coating layer composition was coated on one surface of a polyethylene terephthalate (PET) film (Teijin-Dupon, KEL86W) as a base layer, dried at 100 ° C. for 30 minutes, and then exposed to ultraviolet light at 1000 mJ / cm 2 to a 50 ⁇ m thick coating film.
- PET polyethylene terephthalate
- KEL86W Tinuvin 326
- a coating layer composition was prepared by mixing 1.59 g, 6.15 g of methyl ethyl ketone as a diluent, and 4.10 g of Tinuvin 477 as a UV absorber.
- a coating layer composition was coated on one surface of a polyethylene terephthalate (PET) film (Teijin-Dupon, KEL86W) as a base layer, dried at 100 ° C. for 30 minutes, and then exposed to ultraviolet light at 1000 mJ / cm 2 to a 50 ⁇ m thick coating film.
- PET polyethylene terephthalate
- KEL86W Tinuvin 477
- a coating layer composition was prepared by mixing 1.59 g, 6.15 g of methyl ethyl ketone as a diluent, and 4.10 g of Tinuvin 477 as a UV absorber.
- a coating layer composition was coated on one surface of a polyethylene terephthalate (PET) film (Teijin-Dupon, KEL86W) as a base layer, dried at 100 ° C. for 30 minutes, and then exposed to ultraviolet light at 1000 mJ / cm 2 to a 50 ⁇ m thick coating film.
- PET polyethylene terephthalate
- KEL86W Tinuvin 477
- Example 2 Except that the UV absorber Tinuvin 477 was not used in Example 2, a display film was prepared in the same manner.
- Example 2 instead of Tinuvin 477 as a UV absorber, the absorbance was 0.17 AU at a wavelength of 380 nm for a concentration of 20 mg / L toluene (path 1 cm) and an absorbance at wavelength 390 nm for a concentration of 20 mg / L toluene (path 1 cm).
- the maximum absorption wavelength: 350nm was used to produce a display film in the same manner.
- a display film was manufactured in the same manner as in Example 1, except that 0.65 g of Tinuvin 326 was used instead of 2.08 g of Tinuvin 326 as a UV absorber.
- a film for display was manufactured in the same manner as in Example 1 except that 7.50 g of Tinuvin 326 was used instead of 2.08 g of Tinuvin 326 as a UV absorber.
- the structure of the display film of an Example and a comparative example is shown in following Table 1 and Table 2.
- the physical properties of the display films prepared in Examples and Comparative Examples were measured and shown in Tables 1 and 2 below.
- Pencil hardness About the coating layer in a display film, it measured by the JIS K5400 method using the pencil hardness tester (Heidon). For the pencil, Mitsubishi's 6B to 9H pencil was used, and the load of the pencil on the coating layer was 1 kg, the angle at which the pencil was drawn at 45 °, and the speed at which the pencil was drawn at 60 mm / min. Pencil Hardness It was measured using a pencil below. If there were no scratches in all five evaluations, the hardness was determined as the pencil hardness.
- the display film was stored at 25 ° C. and a relative humidity of 50% RH for 1000 hours, and was evaluated as X when precipitation occurred as white spots in the adhesive layer or coating layer, and ⁇ when no precipitation occurred.
- Example 1 Example 2 Example 3 Example 4 Example 5 UV absorber containing layer Adhesive layer Adhesive layer Coating layer Coating layer Adhesive layer and coating layer UV absorbers Tinuvin 326 Tinuvin 477 Tinuvin 326 Tinuvin 477 Tinuvin 477 UV absorber content in the adhesive layer (% by weight, total solids) 7.83 13.24 0.00 0.00 9.06 UV absorber content in the coating layer (% by weight, based on total solids) 0.00 0.00 4.82 4.82 4.82 Transmittance at 380nm (%) 0.23 0.37 0.35 0.48 0.37 Transmittance at 390nm (%) 0.30 0.44 0.42 0.54 0.44 Pencil Hardness of Coating Layer 9H 9H 6H 6H 9H Storage reliability ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇
- the display film of the present invention has a transmittance of 1% or less at a wavelength of 380nm to 390nm to improve external light stability for the display device as well as excellent long-term storage reliability.
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Abstract
Description
실시예1 | 실시예2 | 실시예3 | 실시예4 | 실시예5 | |
UV흡수제 포함층 | 점착층 | 점착층 | 코팅층 | 코팅층 | 점착층과 코팅층 |
UV흡수제 종류 | Tinuvin 326 | Tinuvin 477 | Tinuvin 326 | Tinuvin 477 | Tinuvin 477 |
점착층 중 UV흡수제 함량(중량%, 총 고형분 기준) | 7.83 | 13.24 | 0.00 | 0.00 | 9.06 |
코팅층 중 UV흡수제함량(중량%, 총 고형분 기준) | 0.00 | 0.00 | 4.82 | 4.82 | 4.82 |
투과율 at 380nm (%) | 0.23 | 0.37 | 0.35 | 0.48 | 0.37 |
투과율 at 390nm (%) | 0.30 | 0.44 | 0.42 | 0.54 | 0.44 |
코팅층의 연필경도 | 9H | 9H | 6H | 6H | 9H |
보관 신뢰성 | ○ | ○ | ○ | ○ | ○ |
비교예1 | 비교예2 | 비교예3 | 비교예4 | 비교예5 | |
UV흡수제 포함층 | 없음 | 점착층 | 코팅층 | 점착층 | 점착층 |
UV흡수제 종류 | - | Tinuvin 384-2 | Tinuvin 384-2 | Tinuvin 326 | Tinuvin 326 |
점착층 중 UV흡수제 함량(중량%, 총 고형분 기준) | 0.00 | 13.24 | 0.00 | 2.59 | 23.45 |
코팅층 중 UV흡수제 함량(중량%, 총 고형분 기준) | 0.00 | 0.00 | 4.82 | 0.00 | 0.00 |
투과율 at 380nm (%) | 82.50 | 0.45 | 0.89 | 0.60 | 0.30 |
투과율 at 390nm (%) | 87.60 | 23.50 | 29.76 | 4.86 | 0.31 |
코팅층의 연필경도 | 9H | 9H | 5H | 9H | 9H |
보관 신뢰성 | ○ | ○ | ○ | ○ | X |
Claims (9)
- 기재층, 상기 기재층의 일면 상에 형성된 코팅층, 및 상기 기재층의 타면 상에 형성된 점착층을 포함하는 디스플레이용 윈도우 필름이고,상기 기재층, 코팅층 및 점착층 중 하나 이상은 UV 흡수제를 각 층에 대하여 약 3중량% 내지 약 20중량%로 포함하고,상기 디스플레이용 윈도우 필름은 파장 390nm 이하에서 투과율이 약 1% 이하인 디스플레이용 윈도우 필름.
- 제1항에 있어서, 상기 UV 흡수제는 톨루엔 중 20mg/L 농도에 대해 파장 380nm에서의 흡광도가 약 0.25AU 이상인 디스플레이용 윈도우 필름.
- 제1항에 있어서, 상기 UV 흡수제는 벤조트리아졸계, 트리아진계 중 하나 이상을 포함하는 디스플레이용 윈도우 필름.
- 제1항에 있어서, 상기 코팅층은 가교성 작용기를 갖는 실리콘 수지를 포함하는 조성물로 형성되는 디스플레이용 윈도우 필름.
- 제4항에 있어서, 상기 가교성 작용기는 지환식 에폭시기를 포함하는 디스플레이용 윈도우 필름.
- 제1항에 있어서, 상기 점착층은 (메트)아크릴계 점착 수지와 경화제를 포함하는 조성물로 형성되는 디스플레이용 윈도우 필름.
- 기재층, 상기 기재층 상에 형성된 점착층 및 상기 점착층 상에 형성된 코팅층을 포함하는 디스플레이용 윈도우 필름이고,상기 기재층, 상기 코팅층 및 상기 점착층 중 하나 이상은 UV 흡수제를 각 층에 대하여 약 3중량% 내지 약 20중량%로 포함하고,상기 디스플레이용 윈도우 필름은 파장 390nm 이하에서 투과율이 약 1% 이하인 디스플레이용 윈도우 필름.
- 제7항에 있어서, 상기 UV 흡수제는 톨루엔 중 20mg/L 농도에 대해 파장 380nm에서의 흡광도가 약 0.25AU 이상인 디스플레이용 윈도우 필름.
- 제1항 내지 제8항 중 어느 한 항의 디스플레이용 윈도우 필름을 포함하는 디스플레이 장치.
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JP2017525417A JP2018504622A (ja) | 2014-11-11 | 2015-11-10 | ディスプレイ用ウィンドウフィルムおよびこれを含むディスプレイ装置 |
US15/525,568 US10613260B2 (en) | 2014-11-11 | 2015-11-10 | Window film for display and display device including same |
CN201580060776.5A CN107075324B (zh) | 2014-11-11 | 2015-11-10 | 显示器窗膜以及包含其的显示装置 |
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JP2019133151A (ja) * | 2018-02-01 | 2019-08-08 | 住友化学株式会社 | 偏光膜形成用組成物 |
WO2020040209A1 (ja) * | 2018-08-24 | 2020-02-27 | 株式会社カネカ | ハードコート組成物、ハードコート付きポリイミドフィルムおよびその製造方法、ならびに画像表示装置 |
JPWO2020105707A1 (ja) * | 2018-11-22 | 2021-10-14 | 味の素株式会社 | 接着剤組成物 |
KR20200114055A (ko) * | 2019-03-27 | 2020-10-07 | 주식회사 엘지화학 | 투명 발광소자 디스플레이 |
JP7412430B2 (ja) | 2019-07-05 | 2024-01-12 | 三井化学株式会社 | 有機el表示素子用封止剤および有機el表示装置 |
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US20170322354A1 (en) | 2017-11-09 |
KR101942144B1 (ko) | 2019-01-25 |
CN107075324A (zh) | 2017-08-18 |
KR20160056817A (ko) | 2016-05-20 |
US10613260B2 (en) | 2020-04-07 |
CN107075324B (zh) | 2020-10-23 |
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